Method of preparing dressings for bandages.



UNITED STATES Patented. March 28, 1905.

PATENT OFFICE.

MAX (JOHN, OF BERLIN, GERMANY.

SPECIFICATION forming part of Letters Patent No. 786,004, dated March28, 1905. Application filed July 1, 1904-.- Serial No. 215,033.

To all whom, it may concern:

Be it known that I, MAX CoHN, a subject of the King of Prussia, GermanEmperor, and a resident of 45 Pankstrasse, Berlin, Kingdom of Prussia,German Empire, have invented a new and useful Process of ManufacturingDressing or Bandaging Stuffs for Dressing Wounds, of which the followingis an exact specification.

My invention relates to a process of manufacturing dressing stuffs fordressing wounds, especially dressing-gauze, which work both in anaseptic and antiseptic manner.

It is known that the dressing-gauze for itself as a beforehand coheringmaterial highly possesses the quality of absorbing and drying out. Thesequalities can be increased by 00111- bining with this coherent materialsuitable non-coherent pulverized substances. A pulverized earthysubstance commercially known under the name of bolus-white, bolusred, orarmenia-bole, which is a silicate of alumina, possesses the quality ofhighly absorbing and drying out the secretions of wounds. It absorbseven great quantities of a fluid, not all at once, but gradually. Thehole has hitherto been employed in such a manner that it was applieddirectly to the wound either for itselffc'. 0., in form of a powder andthen covered with gauze-or it was first loosely strewn in small pouchesor bags, and thereby applied to the wounds. Such a management has thedisadvantage that great care must be taken, and in spite of this aninjurious efl'ect can arise, as even at the slightest quickmotion of thestuff the bole-powder dusts out, fills the cavi-.

ties of the wound, pastes up the wound-surfaces, and prevents acontinuous evaporation and drying out of the secretions. My presentinvention gets rid of these disadvantages. The gauze or the stufl ismade suitable to take up great quantities of bole, so that a dusting outis prevented, and also the quality of both materials to absorb is notdiminished, thereby avoiding a loss of the aseptic qualities of thematerials. By my invention an antisepsis of the gauze is at the sametime produced, as the preparation of the gauze or the like makes itpossible to incorporate also other suitable substances withoutdiminishing the qualities of the gauze as bole-gauze.

The essential feature of the process consists in incorporating into thestuff the bole in combination with a soap, preferably resinous soap. Byemploying soap considerably more bole can be made adhere. On the otherhand substances as alkali, turpentine-oil, benzoic acid, acetic acid,and the like work antiseptically or influence the asepsis or solution,can better be incorporated in emulsion or solution on account of thepresence of soap, without reducing by these admixtures the importantqualities of the bole-gauze to suck up.

In the following an example for manufacturing dressing-gauze shall bedescribed.

One kilogram of good white bole and three hundred and fifty grams of asolution of caustic soda of five per cent. is boiled in a waterbath.Hereby not only a removal of a part of the water, but also a certaindecomposition of bole, probably takes place. If the mixture has becomehalf soft, it is stirred up with about three hundred grams ofturpentine-oil and fifty grams of colophony. This mixture is then oncemore treated in a waterbath for about one hour. The result is ahalf-soft paste, to which in certain cases benzoic acid or the like canbe added. For using this paste the same is stirred up in water and thegauze is impregnated with this milkllike 1fluid. This impregnated gauzeis then riec.

Having thus fully described the nature of my invention, what I desire tosecure by Letters Patent of the United States is- 1. The method ofpreparing a dressing for bandages or the like which consists insuspending bole in a resin-soap solution, impregnating the gauze orfabric therewith and drying the same.

2. The method of preparing a dressing for bandages or the like whichconsists in suspending bole in a mixture of alkali and resin,

and impregnating the gauze or fabric there- In testimony whereof I havesigned my with, and then drying the same. name to this specification inthe presence of I 3. The method of preparing a dressing for twosubscribing witnesses.

bandages or the like, which consists in sus- M AX (JOHN pending bole ina resln-soap solution contalning caustic soda in water, adding theretoben- WVitnesses:

zoic acid, impregnating the gauze or fabric \VOLDEMAR HAUPT,

therewith, and then drying. HENRY HASPER

